UAZ COOLING SYSTEM
I Upper radiator tank
2. Radiator cap
3. Connecting hose
expansion tank
4. Connecting hose
cooling radiator
5. Fan belt
6. Thermostat bottle
7. Outlet pipe
8. Tank cover
9. Expansion tank
10. Mounting bracket
expansion tank
C System pump gasket
cooling
12 Distribution pipe
cooling systems
13. Sleeve
R Cooling jacket
engine block
15. Cooling system jacket
engine block heads
16. Impeller
17. System pump bracket
cooling
18. Tp>fia connecting
19. Connecting hose
abducting
20. Bracket
2L Radiator valve
22. Suspension cushions
radiator
23. Frame cross member
24. Crane control rod
radiator
25. Fan shroud
26. Cooling radiator
27. Control rod shell
blinds
28. Radiator shutters
29. Control bracket
curtains blinds
30. Mounting side
curtain blinds
3L Blind curtain
32. Blind control handle
33. Fan pulley
34. System pump housing
cooling
35. Fan
36. Temperature indicator sensor
coolant
37.
38.
39.
40.
4L
42.
43.
44.
45.
46.
47.
48.
49.
50.
5L
52.
53.
54.
55.
56.
57.
58.
59.
60.
I.
37. Indicator lamp (red)
emergency overheating
coolant
38.Temperature indicator
coolant in the block
engine cylinders
39. Warning lamp sensor
cooling temperature
fluid in the radiator
40.Radiator mounting bracket
41. Radiator mounting rod
42.Bracket for fastening the rod on
side of the hood
43.Exhaust valve
44.Intake valve
45. Thermostat bypass channel
46.Thermostat housing
47.Thermostat valve
48.Hub
49.Water pump roller
50. Front bearing
51. Spacer sleeve
52. Control hole
53. Rear bearing
54. Press - oiler
55.Spring
56.Cuff ring
57.Cuff
58.Cuff clip
59. Sealing washer
60. Retaining ring
I. Radiator suspension diagram
cooling
II. Radiator Mount
cooling on the body
III. Coolant pump
IV. Coolant circulation diagram
liquid ajar
thermostat valve
V. Coolant circulation diagram
liquid when closed
thermostat valve
VI. Plug valve operation diagram
radiator:
A - with high blood pressure
fluids in the system
B - when there is a vacuum in the system
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Radiator……………………………………………………………………..tubular-ribbon with three rows of tubes
Thermostat…………………………………………………………………….. a non-separable, heat-sensitive element with a solid filler.
Start of valve opening at 68-72 ‘C Full valve opening
at 81-85°C
Coolant………………………………………………………low-freezing liquid Antifreeze A-40M, Antifreeze A-65M or water
MAINTENANCE
Avoid getting coolant into the oil when removing the head or for other reasons, as this causes resinization of the oil, which
can lead to coking and loss of mobility of the pushers, resin deposits and blocking of small holes supplying lubricant to
rubbing surfaces.
Maintenance of the cooling system consists of removing scale and sediment from it, adjusting the tension of the fan belt and
lubricating the bearings of the cooling system pump, as well as flushing the radiator from the outside.
Flush the cooling system once a year before the summer operating season.
Remove scale from the cooling system by flushing it with a strong stream of clean water. Wash the engine separately from
radiator so that rust, scale and sediment from the engine cooling jacket do not clog the radiator. Before flushing the engine, remove
remove the thermostat and disconnect the hoses from the radiator.
Adjust the fan belt tension by turning the generator. The normal deflection of the belt should be 8 - 14 mm when pressing it with
with a force of approximately 4 kgf.
Check the operation of the thermostat simultaneously with flushing the cooling system, as well as in case of systematic overheating of the engine
(with proper operation of the power supply and ignition systems).
To check, place the thermostat together with a thermometer in a vessel with water heated to a temperature of 90 - 100 'C. Then, with gradual
When cooling the water, monitor the starting (80 ± 2 °C) and closing temperature (70 ± 2 *C) of the thermostat valve. Faulty thermostat
replace with a new one.
When checking the thermostat, pay attention to the cleanliness of the valve disc. Remove scale and dirt from the surface of the thermostat with a wooden
spatula, then rinse in water.
You can also check the serviceability of the thermostat by heating the inlet pipe of the upper radiator tank when the engine warms up. Pfi
If the thermostat is faulty, the pipe warms up immediately after starting the engine; if the thermostat is working properly, the pipe warms up after the temperature of the water in the block
will reach 60 - 70 ‘C (according to the coolant temperature indicator on the instrument panel).
Lubricate the bearings of the cooling system pump after 16,000 km (Litol-24, Lita, Litol-24RK).
Lubricate the bearings through the grease nipple until the grease comes out of the inspection hole. Remove excess grease as it may
get on the fan belt and damage it.
Check the blinds for completeness of opening with the drive handle pushed in all the way.
Drain the liquid from the engine cooling system through two taps. One of them is located on the lower radiator tank, the other on
cylinder block. When draining, remove the radiator cap and open the heater shut-off valve located on the block head
cylinders
On vehicles of the UAZ-3741 family, a high-performance heater with a drain valve can be installed
fluids from the heating system. When draining, it is necessary to open the valve on the heater drain hose.
Cooling and heating system for UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365, with injection engines ZMZ-4091 Euro-3 and ZM Z -40911 Euro-4, liquid, closed, with forced circulation of coolant.
The cooling system of carriage-type vehicles UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365 includes:
The cooling system of UAZ wagon-mounted vehicles with ZMZ-4091 Euro-3 and ZMZ-40911 Euro-4 engines, according to the operating manual, must be filled year-round with low-freezing coolant TOSOL-A40M or OZh-40 “Lena”. When the ambient temperature is below minus 40 degrees, the cooling system should use low-freezing liquid TOSOL-A65M or OZH-65 “Lena”.
The capacity of the cooling system of the ZMZ-4091 Euro-3 and ZMZ-40911 Euro-4 engines, including the heating system, is:
For UAZ-374195 and UAZ-330395 cars: 12.7 liters.
- For cars UAZ-396295, UAZ-396255, UAZ-390995, UAZ-220695: 13.7 liters.
- For UAZ-330365 and UAZ-390945 cars: 13.6 liters.
The operating temperature of the coolant in the cooling system should be between 80-105 degrees. Short-term, no more than five minutes, operation of the ZMZ-4091 Euro-3 and ZMZ-40911 Euro-4 engines is allowed when the coolant temperature rises to 109 degrees. If the coolant overheating indicator light comes on, the cause of the overheating must be immediately determined and eliminated.
UAZ heating system of carriage layout with ZMZ-4091 Euro-3 and ZMZ-40911 Euro-4 engines.
The liquid heating system of UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365 vehicles, combined with the engine cooling system, includes:
Cabin heater radiator.
- Interior heater radiator, except for UAZ-374195, UAZ-330395, UAZ-330365 vehicles.
- Additional heating pump.
- Coolant supply connection to the interior heater.
- Heater valve with control.
- Drain valve or plug of the heating system.
The heating system on cars with a ZMZ-4091 Euro-3 engine differs from the heating system of cars with a ZMZ-40911 Euro-4 engine in the location of the additional electric pump of the system. In the first case, it is included in the cabin heater radiator line, and in the second case, in the cabin heater radiator line.
For normal operation of the cabin and interior heaters, the temperature of the coolant in the engine cooling system must be at least 80 degrees. To turn both heaters into operation, you need to open the heater switch remotely from the cabin or manually and, if necessary, turn on the additional heating system pump.
To increase the heating intensity of the cabin and interior, both heaters are equipped with 25-watt ME236 electric motors with a blade fan. They are turned on and off using separate switches on the instrument panel. The strength of the external air flow passing through the cab heater radiator can be adjusted by changing the position of the front end ventilation flap cover.
At low air temperatures, you can install insulation on the car, which is attached to the radiator trim with screws. In this case, it will be possible to regulate the temperature of the liquid in the engine cooling and heating system by closing or opening the insulation valve.
The embodied diagram of the UAZ Bukhanka heating system attracts special attention from the owners of this car when upgrading the car’s interior. After all, all car owners understand that the interior of this off-road car is very far from its foreign counterparts in terms of comfort, although this model was originally designed for use by special services, and what can one expect for such an affordable price.
Possible options for tuning the UAZ Bukhanka interior
As already indicated, the UAZ 452 car was created to meet the high requirements of specialized transport for the Ministry of Emergency Situations, military and medical services. True, this fact is absolutely not a statement that the performance of this car can be considered impeccable. That is why, when tuning the interior of the Loaf, not only the heating system is modernized, but also many other parts and elements.
First of all, when modifying the interior of the UAZ Bukhanka, most car owners replace the standard hard seats with more modern and soft analogues, since the basic seats can shake out the soul when moving, which is especially typical for off-road driving. Moreover, some craftsmen even integrate heated and electric chairs, for which the existing electrical equipment connection diagram is adjusted.
At the next stage, attention is paid to soundproofing the interior of the UAZ 452 and fixing the elements of the dashboard, however, before fastening the elements, the heating system of the Bukhanka is modernized, which will be discussed further. In terms of style, the interior can be decorated with leather, the dashboard can be decorated with wooden inserts or wood-look details.
Often, a variety of additional accessories appear in the interior of the UAZ Bukhanka, including shelves, glove compartments and ashtrays. The steering wheel is often replaced with a modern imported analogue with soft upholstery made of leather or other material.
Of course, there are other options for modifying the interior of this car, which depends on the imagination of the car owner, but one of the key aspects of tuning the interior is still the upgraded circuit of the Bukhanka heating system, since the standard heater simply cannot cope with its immediate responsibilities.
How Bukhanka's heating system can be upgraded
When the UAZ Bukhanka heating system diagram is being finalized, the following aspects must be taken into account.
The heater radiator should be located below the level of coolant present in the cooling system, so that this substance is pumped through it more efficiently and is always present in it. To do this, you can make the cooling system closed by integrating an atmospheric valve in the expansion tank cap. In this case, in the latter, the coolant level should always be higher than the installed heater radiator.
Air must be pumped with a less noisy centrifugal fan, which should be located along the air flow to the radiator. This approach will further reduce the noise level.
The air flow through the radiator must pass solely due to the pressure generated by the fan, and not through kinetic energy. In this case, the fan nozzle should not blow directly into the radiator honeycomb, since the air will pass unevenly through the radiator.
The temperature of the discharge air should be regulated by a damper that mixes cold and hot air flows, and not by a tap. When using a tap, the temperature will greatly depend on the operating mode of the power unit, and the damper can be used to regulate the ratio of both air flows.
The driver and passenger of the UAZ 452 will feel more comfortable when a higher temperature develops in the legs and lumbar region, and colder air should be present at face level to prevent drowsiness. To do this, the heating system circuit must be constructed in such a way that hot air is forcedly supplied to the legs and glass, and colder air must flow to the face, which can be achieved by additional selection of cold air masses between the radiator and the fan, as well as by means of an adjustable air mixing damper streams.
One of the options for modernizing the heating system of the Loaf could be the following sequence of actions, which consists in integrating a pair of snails onto a standard stove body:
- one snail is taken from the Bukhanka salon stove, the body of the second must be borrowed from the MTZ-82, and the fan and motor are installed from another UAZ stove;
- you need to stick a turbine from the Volga into the snail, since the standard one is very small and does not inspire confidence;
- then hoses are connected to the volute, for which a plate with a pair of holes is simply made, which is the easiest solution;
- after this you need to take ordinary sewer bends with a dimension of 50 * 45, which are attached to the plate. Mounting them is also very simple. It is necessary to take plugs from the 50 pipes and make holes in them to form a ring with a side. The entire structure is then inserted into the plate;
- To rotate the outlet, you need to put a pair of rubber rings on it, which can be borrowed from tractor hydraulics. Then the entire structure is applied to the snail, and as a result you need to get a similar design with the second snail. Don't forget about integrating diffusers;
- The work is completed by fastening the snail to the plate using bolts, rivets and welding, after which the product is painted. It is important to remember that the heater body cannot be removed without first draining the antifreeze and disconnecting the hoses from the radiator.
Conclusion
Concluding our discussion of our topic, we note that if you invest certain funds and effort into the Loaf, you can get an SUV that is quite comfortable for movement. At the same time, the design of the UAZ Bukhanka heating system must be modernized without fail, since the basic heater is unlikely to live up to its name in the cold season.
Read more:
- Tuning the interior of the UAZ "Loaf"
Any owner of a UAZ Bukhanka car understands that his SUV is very far from its foreign counterparts in terms of interior comfort. Of course, it is much cheaper and was originally developed in...
- Do-it-yourself UAZ “Bukhanka” tuning
UAZ-452, popularly known as “loaf” and “tablet”, is an all-wheel drive two-axle utility vehicle, available in flatbed and body versions, with a long history (its production started...
pro-vnedorozhniki.ru
Heating diagram UAZ 452
xcschemers.appspot.com
Cooling and heating system of UAZ wagon layout with ZMZ-4091 Euro-3 and ZMZ-40911 Euro-4 engines.
Cooling and heating system for UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365, with injection engines ZMZ-4091 Euro-3 and ZM Z -40911 Euro-4, liquid, closed, with forced circulation of coolant.
The cooling system of carriage-type vehicles UAZ-374195, UAZ-396295, UAZ-396255, UAZ-390995, UAZ-390945, UAZ-220695, UAZ-330395, UAZ-330365 includes:
Channels for the passage of coolant in the cylinder head. - Intercylinder channels for the passage of coolant in the cylinder block. - Cooling system radiator. - Water pump. - Cooling fan. - Fluid coupling of the cooling system fan drive. - Expansion tank. - Two-valve thermostat.
Coolant temperature gauge sensor.
Engine control unit coolant temperature sensor. - Radiator drain plug. - Drain valve or cylinder block plug. - Throttle device heating hoses.
Connecting pipes and hoses.
auto.kombat.com.ua
Heater UAZ "Loaf"
A car consists of many components. Each of them requires increased attention. Therefore, drivers must monitor the condition of their “iron horse”. The issue of preparing the car for the winter period is especially important.
Here, the presence of a well-thought-out heating system plays a vital role. Let's talk about it in the UAZ "Loaf".
Meaning:
This system is important, first of all, for maintaining normal temperature in the cabin at any time of the year, for ventilation of the air inside the car.
Most “loaf” models are equipped with a high-power heater “N-1” produced by NAMI.
Design:
The heater includes the following elements:
- Radiator.
- Fan.
- Special device for air distribution.
There are two main operating modes:
- When fresh air comes in.
- When recirculating flows.
The second mode implies increased temperature in the cabin. To do this, you need to close the air intake and then open the damper. In the first mode, the actions are performed in the reverse order.
A special unit controls the entire system. A tap is used for adjustment. A new design based on increased flow circulation and the use of fluid in the radiator allows the interior to warm up faster.
It is important to remember about glass blowing. Otherwise, this will lead to icing or fogging. The driver and passengers will feel discomfort.
If moisture gets in, it is removed through the air intake. A docking device is used here.
Breaking
Often, car enthusiasts are faced with cases when the heater (stove) does not perform its direct functions and does not heat. What could be the reasons?
- There is damage in the channels through which air passes.
- Antifreeze is leaking.
- The system is dirty, therefore the temperature is insufficient.
- The faucet on the stove was leaking.
- The valve responsible for protecting the engine has burnt out.
Shall we update?
How to replace a used stove with your own hands? What will you need for this? Everything can be done using the following algorithm.
- We drain all the antifreeze and disconnect all wiring.
- Disconnect the console from the shield. We remove the heating unit, the air intake hatch, remove the seal, and then clean the recesses.
- We try on the air filter, drill holes no more than 3.2 mm in diameter.
- Apply a large layer of sealant to the installation site. We install the housing and fix it. We return the filters from the cabin to their place.
- We install a new heater in the cabin, securing it with studs and M-6 nuts. We fix the node, then install the block console. We fix the entire structure with self-tapping screws.
- Next, we connect the control rod and secure it. We connect the pipes containing the antifreeze to the unit and secure them with special clamps. Then we install blowing channels for the glass.
- Finally, we connect the electrics, fill the system and check how it works. If problems occur, the entire system must be rechecked.
Finally
The heating system of the UAZ “Bukhanka” car is very simple in design. If you do not check its operation in time, eventually the owner will have to spend money on a car service.
22 ..ENGINE COOLING SYSTEM OF UAZ-469 CAR
The engine cooling system (Fig. 43) is liquid, closed, with forced circulation of liquid.
Fill the cooling system with soft fresh water - with a low salt content.
In winter, you can use a liquid with a low freezing point - antifreeze. At temperatures down to minus 40°C, use grade 40 fluid; at lower temperatures, use grade 65. Remember that antifreeze is poisonous.
Maintain the correct engine temperature of 80... 90°C. This reduces engine wear and improves efficiency. Maintain the temperature using blinds
Rice. 43. Engine cooling system diagram:
1 - drain edge of the cylinder block; 2- gasket; 5 - cylinder head;
4 - hole in the water distribution pipe; 5 - water distribution pipe; € - thermostat; 7 - outlet pipe; 8 - bypass channel; 9 - impeller; 10 - drain; 1 - fan; 12 - radiator; 18 - radiator drain valve; 14 - inlet pipe; 15 - cylinder block; 16 - radiator filler neck; 17 - hose; 18 - plug; 19 - expansion tank;
20 - “minimum” mark
Rice. 44. Engine cooling pump:
I - nut; 2 - roller: 3 - pump housing; 4 - control hole for lubricant outlet; 5 - grease fitting; 6 - spacer sleeve; 7 - sealing washer; 8 - rubber cuff; 9 - spring; 10 - impeller; 11 - impeller fastening bolt; 12 - control hole for liquid outlet; 13 - bearings; 14 - fan pulley hub
And the radiator insulation valve. To monitor the coolant temperature, there is a sensor in the water pump bracket, and an electrical indicator on the instrument panel. In addition, a red control light is installed on the instrument panel, which lights up when the liquid temperature rises to 106... 109С. The reasons for the increase in fluid temperature may be a low fluid level in the radiator, a loose fan belt, or driving the vehicle with the blinds closed and the radiator insulation valve closed. The warning lamp sensor is installed in the upper radiator tank. If the lamp lights up, immediately eliminate the cause of overheating.
The pump (Fig. 44) is of a centrifugal type, driven by a V-belt from the crankshaft pulley. The pump shaft is sealed using a self-clamping oil seal. Coolant leakage through the inspection hole at the bottom of the pump housing indicates a seal failure. It is impossible to close the inspection hole if liquid leaks from it, as it will get into the ball bearings and can damage them.
The thermostat (Fig. 45) with a solid filler is placed in the outlet pipe. The thermostat valve begins to open at a coolant temperature of 70±2°C, and at a temperature of 83±2°C it opens completely.
The thermostat automatically maintains the required engine coolant temperature by turning the radiator off or on. In cold weather in winter, especially at low engine loads, to avoid freezing the radiator, always keep the shutters closed and only open them slightly when the coolant temperature rises to 90°C. - h
The radiator plug (Fig. 46) hermetically closes the radiator and communicates with the cooling system to the atmosphere only through the exhaust and intake valves. The exhaust valve opens when the pressure in the system increases to 0.45... 0.65 kgf/cm2 and releases steam. The inlet valve opens at a vacuum in the system of 0.01 ... 0.1 kgf/cm2 and admits atmospheric air into the radiator. For the plug to function properly, the valve gaskets must be in good working order.
Cooling system maintenance. While operating the vehicle, periodically remove scale and debris from the cooling system, adjust the fan belt tension and lubricate the water pump bearings (see lubrication table), and also flush the radiator from the outside.
Rice. 45. Thermostat operation diagram:
1 - thermostat valve is closed; 5 - thermostat valve is open
Remove scale and debris by rinsing with a strong stream of clean water. Wash the engine and radiator separately so that rust, scale and sediment from the engine cooling jacket do not clog the radiator. Before flushing the engine, remove the thermostat from the pipe.
The direction of the jet should be opposite to the direction of water movement during normal operation of the system (Fig. 47).
It is prohibited to use alkaline solutions to wash the cooling jacket, as they cause corrosion of the engine head and cylinder block.
If there are significant scale deposits in the radiator tubes, do the following:
1. Remove the radiator from the car and pour into it a ten percent solution of sodium hydroxide (caustic soda), preheated to a temperature of 90°C and filtered.
2. After 30 minutes, drain the solution from the radiator.
3. Rinse the radiator with a stream of hot water in the direction opposite to the water circulation in the engine for 30... 40 minutes under a pressure of 0.5 kg/cm2 (Fig. 48).
Adjust the fan belt tension by turning the generator. The normal deflection of the belt should be 8... 14 mm when pressing it with a force of 4 kgf (Fig. 49).
If the fan belt starts to slip, increase the tension.
